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Forming method of large rotary casting

A molding method and technology of gyratory body, applied in casting molding equipment, casting mold components, casting molds, etc., can solve the problems of long production cycle and high production cost, and achieve the effect of saving usage, preventing adhesion and reducing production cost.

Active Publication Date: 2018-04-27
KOCEL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the technical problems of high production cost and long production cycle when large-scale rotary castings are produced in a single piece or in small batches, the present invention proposes a new molding method, and the specific technical scheme is as follows:

Method used

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  • Forming method of large rotary casting

Examples

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Embodiment 1

[0034] The specific molding method of the casting is as follows: the forming hanger of the first cavity 1 is formed by the inner cavity sand core 5, the second cavity 2 and the third cavity 3 are formed by the central sand core 6, and the outer contour slope is less than 1. structure, the corresponding mold cavity is formed by the outer contour sand core 4 that is exactly the same as the outer contour shape and structure of the part of the casting, and the inner cavity structure of the outer contour sand core 4 is the same as the outer contour shape of the inner cavity sand core 5 The structures are exactly the same, and the casting structure whose outer contour slope is greater than 1, the corresponding casting mold cavity is formed by the pattern 10 that is exactly the same as the outer contour shape and structure of this part of the casting. Wherein, the pattern 10 is a lost foam, and the top of the pattern 10 is designed with a structure for fixing the core head of the cent...

Embodiment 2

[0045] On the basis of Embodiment 1, the inner cavity sand core 5 is improved so that it is formed by combining a plurality of small sand cores, such as Figure 4 with Figure 5 As shown, the specific structure includes: 6 single sand cores 51 and scraper scraping sand cores 52 with the same shape and structure, and the outer contour after combining multiple single sand cores 51 and scraper scraping sand cores 52 is the same as that of the first The shape and structure of the cavity 1 are exactly the same. Among them, the molding method of the scraper scraping sand core 52 is as follows: After combining a plurality of single sand cores 51, pour resin sand into the inner cavity of the combined sand core, and use a flat scraper 11 to scrape the surface of the sand core after filling. . The molding method of the single sand core 51 is: filling the core sand into the core box, and opening the mold after hardening.

[0046] In this embodiment, the specific steps of the casting f...

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Abstract

The invention provides a forming method of a large rotary casting, which solves the technical problems of high production cost and long production cycle of a traditional forming method. The forming method specifically comprises the steps of forming a forming hanging tire of a first cavity from an inner cavity core, forming a second cavity and a third cavity from center cores, forming a mold cavitycorresponding to a casting structure of which the slope is less than 1 from an outer contour core which is identical with the outer contour shape of the casting, wherein the structure of an inner cavity of the outer contour core is identical with that of the outer contour shape of the inner cavity core, and forming a mold cavity corresponding to a casting structure of which the slope of the outercontour is greater than 1 from a model which is identical with the outer contour shape of the casting. According to the method, the production cost and the production cycle of single large rotary casting and small batches of large rotary castings are obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of casting molding of large castings, and in particular relates to a molding method of large rotary castings. Background technique [0002] Such as Figure 1 to Figure 3 As shown, the castings of the hydroelectric rotary body have the characteristics of simple structure, small change in contour size, and smooth transition. Large-scale rotary castings are produced by traditional molding methods, and external molds and core boxes need to be made. Castings are produced by casting molds and sand cores after assembly. However, for single-piece or small-batch production castings, traditional molding methods are used. Production The cost is high and the production cycle is long. Contents of the invention [0003] Aiming at the technical problems of high production cost and long production cycle when large-scale rotary castings are produced in a single piece or in small batches, the present invention proposes a n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/24B22C9/10B22C9/02B22C9/04B22C3/00
CPCB22C3/00B22C9/02B22C9/04B22C9/103B22C9/24
Inventor 郭小利
Owner KOCEL STEEL
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